EP0407424A1 - Marine drive lower unit with thrust bearing rotation control - Google Patents
Marine drive lower unit with thrust bearing rotation controlInfo
- Publication number
- EP0407424A1 EP0407424A1 EP89903886A EP89903886A EP0407424A1 EP 0407424 A1 EP0407424 A1 EP 0407424A1 EP 89903886 A EP89903886 A EP 89903886A EP 89903886 A EP89903886 A EP 89903886A EP 0407424 A1 EP0407424 A1 EP 0407424A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- spacer
- disposed
- propeller
- combination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/323—Bearings for coaxial propeller shafts, e.g. for driving propellers of the counter-rotative type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19023—Plural power paths to and/or from gearing
- Y10T74/19074—Single drive plural driven
- Y10T74/19121—Concentric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19628—Pressure distributing
Definitions
- This invention relates to a marine drive lower unit with thrust bearing rotation control.
- Marine drives normally include an outboard positioned drive unit which includes a gear case for mounting a vertical main drive shaft connected at its upper end to a source of power, such as a marine en ⁇ gine.
- the lower portion of the drive shaft passes through a lower gear case portion which, in turn, is constructed in a manner to provide a generally hori ⁇ zontal torpedo housing.
- the housing serves to mount a pair of coaxial propeller shafts which are driven by the main drive shaft and which drivingly rotate a pair of contra- rotating marine propellers which are disposed generally aft of the gear-case.
- the present invention provides a marine drive, the combination comprising a generally vertical gear case terminating in a lower torpedo housing a first propeller shaft disposed within said housing and extending longitudinally in a fore-to-aft direction and rotatable on a longitudinal drive axis, a second propeller shaft concentric with said first shaft and adapted for contra-rotation relative to the latter, propeller means mounted respectively to said shafts, drive means for connecting said propeller shafts to a marine engine, and with said drive means including an engine rotatable pinion, a rearwardly positioned driving gear meshing with said pinion and disposed for rotation with said second shaft, and a forward driving gear spaced forwardly from said rear ⁇ ward driving gear and meshing with said pinion, said forward driving gear being disposed for rotation with said first shaft, said rearward and forward driving gears having respective opposed inner faces, forward thrust bearing means mounted adjacent each said respective inner face, characterized by forward tnrust transmitting' spacer means coaxial with said propeller shafts and sandwiched
- the.thrust load is ultimately transferred from the outer propeller shaft to the inner central shaft.
- the result is to reduce the rotational speed of each thrust bearing, in this instance by half.
- Figure 1 is a schematic side elevational view of a marine stern drive unit which incorporates the various aspects of the invention
- Figure 2 is an enlarged fragmentary vertical generally sectional view of an intermediate portion of the torpedo housing
- Figure 3 is a transverse vertical section taken on line 3—3 of Figure 2.
- Ar_ internal combustion engine 4 is disposed within the boat and includes an output with a shaft 5 which extends through transom 2 to unit 1, in the usual manner.
- Stern drive unit 1 generally includes a stern drive housing 6 forming an upper gear case 7, a lower gear case 8 suitably mounted to gear case 7, and a generally horizontally fore-to-aft extending torpedo housing 9 forming a portion of and disposed at the bottom of gear case 8.
- a pair of coaxially mounted propellers 10 and 11 are mounted for rotation generally aft of hous ⁇ ing 9.
- a pinion 12 is disposed on the outer end of shaft 5 and meshes with a gear 13 mounted to the upper end of a vertical main drive shaft 14 within upper gear case 7.
- Main drive shaft 14 extends downwardly and through lower gear case 8, and is provided with a pinion 15 on its lower end which is held in place by a securement member such as a.threaded retaining nut 15a.
- Pinion 15 meshes with a forwardly disposed rearwardly facing Iriving gear 16 mounted for rotation about a horizontal propeller drive axis 17.
- Gear 16 includes an annular toothed gear body 18 having a forwardly disposed surface 19, with body 18 merging into a forwardly extending sleeve 20.
- Gear 16 is splined or otherwise mounted on and for rotation with a central axial longitudinally extending first propeller shaft 21. (See FIG. 2)
- Gear body 18 is also provided with an annular rear face 22 which is normally in engaging relationship with a forwardly facing shoul ⁇ der 23 on shaft 21.
- pinion 15 meshes with a rear- wardly disposed forwardly facing driving gear 24 which is also mounted for rotation about drive axis 17.
- gear 24 forms the forward end portion of a longitudinally extending second propeller shaft 25 and includes an annular toothed gear body 26 having a rearwardly disposed surface 27 and an annular front face 28. Front face 2E is disposed in opposed relation to face 22.
- Second propeller shaft 25 is generally tubular and concentric with shaft 21.
- rear propel ⁇ ler 10 is mounted to the rearward end of central first propeller shaft 21, while front propeller 11 is mounted to the rearward end of second propeller shaft 25, in any suitable well known manner.
- the result in this instance is to provide contra-rotating propellers .
- Forward gear 16 and shaft 21 are supported for rotation in housing 9 by suitable support bearings 29, while rearward gear 24 and shaft 25 are likewise supported by support bearings 30 and 31.
- An annular bearing adapter 32 is disposed at the forward end portion of gear 16 and comprises an enlarged body 33 having a radially extending annular collar 34.
- Body 33 merges rearwardly into a sleeve portion 35 of reduced diameter which is concentrically and slidingly disposed between sleeve 20 of gear 16 and propeller shaft 21.
- a nut 36 is threadably mounted to the forward end of shaft 21 and serves to clamp adapter body 33 against the abutment formed by the forward terminus 37 of sleeve 20.
- Reverse thrust is carried by reverse thrust bearing means.
- an annular ring-like roller-type thrust bearing assembly 39 is confined between surface 27 of driving gear 24 and a portion of gear case 8.
- a similar thrust bearing assembly 40 is confined between the rearward side of bearing adapter collar 34 and a portion of the gear case. Reverse tnrust forces 38 on shaft 21 are transmitted to bearing assemblies 39 and 40.
- forward thrust bearing means are provided to carry the forward thrust forces, il ⁇ lustrated by the arrow 41, on shaft 21.
- a thrust bearing assembly 42 of generally similar type is confined between surface 19 of driving gear 16 and a portion of gear case 8. Forward thrust in the direction of arrow 41 is transmitted from propeller shaft 21 and through shoulder 23 to rearward gear surface 22 of gear 16, and hence from forward gear surface 19 to bearing assembly 42. In the em ⁇ bodiment shown, forward thrust is only partially and selectively carried by bearing assembly 42.
- a pre ⁇ loaded second forward thrust bearing assembly 43 also carries part of the load.
- the forward thrust forces are to be transferred from outer propeller shaft 25 to central propeller shaft 21, with the ulti ⁇ mate forward thrust load being carried by the as ⁇ sociated elements including gear 16, adapter 32 as well as bearing assemblies 42 and 43 which are disposed for ⁇ wardly of gear 16.
- the ulti ⁇ mate forward thrust load being carried by the as ⁇ sociated elements including gear 16, adapter 32 as well as bearing assemblies 42 and 43 which are disposed for ⁇ wardly of gear 16.
- means are provided to transfer the forward thrust forces from shaft 25 and its associated gear 24 and hence to gear 16 and its associated shaft 21.
- a first and rearwardly positioned annular thrust bearing assembly 44 of any well-known type is disposed adjacent front face 28 of rear driving gear 24.
- a second and forwardly positioned annular thrust bearing assembly 45 of simi ⁇ lar type is disposed adjacent rear face 22 of front driving gear 16.
- Bearing assemblies 44 and 45 are axially spaced, with assembly 44 being disposed rear- wardly of main drive shaft 14 and assembly 45 being disposed forwardly thereof in the present embodiment.
- Means are provided to transfer the forward thrust load from bearing assemblj' 44 to assembly 45.
- a load transferring spacer 46 is clampingly sandwiched between the assemblies. As best seen in FIGS. 2 &.
- spacer 46 comprises a generally cylindrical central body portion 47 mounted coaxially about propeller shaft 21 and having end edges 48 and 49 which engage bearing assemblies 44 and 45 respectively.
- a key 50 extends radially outwardly from body portion 47 and engages within a longitudinal slot 51 in gear case 8. Slot 51 extends generally between gears 16 and 24.
- the con ⁇ struction is such as to fix spacer 46 against rotation while it remains free to float longitudinally along axis 17.
- the extent of axial movement of spacer 46 is limited by the opposed edges 52 of a recess 53 disposed in spacer body portion 47 and which receives main drive shaft nut 15a.
- Spacer 46 is located on its axis by bearing assemblies 44 and 45 acting together and, during opera ⁇ tion of the device, serves to transfer the forward thrust from assembly 44 associated with outer propeller shaft 25 to assembly 45 which is associated with inner propeller shaft 21.
- each bearing assembly 44, 45 By placing a forward thrust bearing assembly 44, 45 on each side of the non-rotatable spacer 46, the rotational velocity or speed of each bearing assembly is only one-half the speed of a single bearing assembly joining the propeller shafts directly, as in the afore ⁇ mentioned U.S. Patent.
- Bearing assembly 44 is only subject to unidirectional rotational forces from the single propeller shaft 25, while bearing assembly 45 is only subject to unidirectional rotational forces asso ⁇ ciated with the single propeller shaft 21.
- the size of each bearing assembly may therefor be reduced without reducing its effective life. And yet, both bearing assemblies carry the full forward thrust load.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Gear Transmission (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Une unité marine d'entraînement (1) comprend une boîte d'engrenage inférieure (8) formant un logement en torpille (9). Deux arbres d'hélices coaxiaux (21, 25) sont montés rotatifs dans le logement et portent une paire d'hélices (10, 11). Les arbres d'hélices sont entraînés par une paire d'engrenages d'entraînement opposés (16, 24) convenablement reliés par l'intermédiaire d'un arbre menant principal (14) sensiblement vertical, à un moteur marin (4), et montés sur l'axe d'entraînement horizontal (17). Une paire de paliers de poussée (44, 45) adaptés pour avancer les charges de poussée, sont respectivement disposés adjacents aux parties de faces des engrenages d'entraînement opposés, ladite paire étant séparée par une pièce d'écartement (46) étroitement confinée entre celle-ci. Ladite pièce d'écartement est bloquée pour ne pas tourner mais peut flotter librement dans un sens axial, et transfère la charge de poussée d'un palier à l'autre, de sorte que ladite charge est finalement transférée de l'arbre d'hélice extérieur (25) à l'arbre central intérieur (21). Le résultat se traduit par une réduction de la vitesse de rotation de chaque palier de poussée, dans ce cas de la moitié.A marine drive unit (1) includes a lower gearbox (8) forming a torpedo housing (9). Two coaxial propeller shafts (21, 25) are rotatably mounted in the housing and carry a pair of propellers (10, 11). The propeller shafts are driven by a pair of opposite drive gears (16, 24) suitably connected via a substantially vertical main drive shaft (14) to a marine engine (4), and mounted on the horizontal drive axis (17). A pair of thrust bearings (44, 45) adapted to advance the thrust loads, are respectively disposed adjacent to the face portions of the opposing drive gears, said pair being separated by a spacer (46) tightly confined between this one. Said spacer is locked so as not to rotate but can float freely in an axial direction, and transfers the thrust load from one bearing to the other, so that said load is finally transferred from the propeller shaft outside (25) to the inner central shaft (21). The result is a reduction in the speed of rotation of each thrust bearing, in this case by half.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US162191 | 1988-02-29 | ||
US07/162,191 US4795382A (en) | 1988-02-29 | 1988-02-29 | Marine drive lower unit with thrust bearing rotation control |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0407424A1 true EP0407424A1 (en) | 1991-01-16 |
Family
ID=22584558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89903886A Ceased EP0407424A1 (en) | 1988-02-29 | 1989-02-13 | Marine drive lower unit with thrust bearing rotation control |
Country Status (5)
Country | Link |
---|---|
US (1) | US4795382A (en) |
EP (1) | EP0407424A1 (en) |
JP (1) | JPH03504705A (en) |
CA (1) | CA1320665C (en) |
WO (1) | WO1989008044A1 (en) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4986775A (en) * | 1989-07-06 | 1991-01-22 | Brunswick Corporation | Propeller shaft bidirectional thrust bearing system |
DE9000354U1 (en) * | 1990-01-15 | 1990-04-19 | Kempf, Klaus-Dieter, 5892 Neuenrade, De | |
US5376034A (en) * | 1992-05-27 | 1994-12-27 | Brunswick Corporation | Marine drive exhaust system |
US5352141A (en) * | 1993-05-28 | 1994-10-04 | Brunswick Corporation | Marine drive with dual propeller exhaust and lubrication |
US5249995A (en) * | 1992-05-27 | 1993-10-05 | Brunswick Corporation | Marine drive having two counter-rotating surfacing propellers and dual propeller shaft assembly |
US5366398A (en) * | 1992-05-27 | 1994-11-22 | Brunswick Corporation | Marine dual propeller lower bore drive assembly |
US5415576A (en) * | 1992-05-27 | 1995-05-16 | Brunswick Corporation | Counter-rotating surfacing marine drive with defined X-dimension |
US5376031A (en) * | 1992-05-27 | 1994-12-27 | Brunswick Corporation | Marine drive with surfacing torpedo |
US5425663A (en) * | 1992-05-27 | 1995-06-20 | Brunswick Corporation | Counter-rotating surfacing marine drive with planing plate |
US5342228A (en) * | 1992-05-27 | 1994-08-30 | Brunswick Corporation | Marine drive anode |
US5344349A (en) * | 1992-05-27 | 1994-09-06 | Brunswick Corporation | Surfacing marine drive with contoured skeg |
US5376032A (en) * | 1992-05-27 | 1994-12-27 | Brunswick Corporation | Marine drive with skeg water inlet |
US5462463A (en) * | 1992-05-27 | 1995-10-31 | Brunswick Corporation | Marine dual propeller lower bore drive assembly |
US5230644A (en) * | 1992-05-27 | 1993-07-27 | Brunswick Corporation | Counter-rotating surfacing marine drive |
JPH06156382A (en) * | 1992-11-28 | 1994-06-03 | Sanshin Ind Co Ltd | Forward/reverse speed shifting device for vessel |
US5514014A (en) * | 1993-10-04 | 1996-05-07 | Sanshin Kogyo Kabushiki Kaisha | Outboard drive transmission |
JP3539573B2 (en) * | 1993-10-29 | 2004-07-07 | ヤマハマリン株式会社 | Ship propulsion device |
US5556313A (en) * | 1993-11-29 | 1996-09-17 | Sanshin Kogyo Kabushiki Kaisha | Outboard drive transmission |
US5556312A (en) * | 1993-11-29 | 1996-09-17 | Sanshin Kogyo Kabushiki Kaisha | Bearing arrangement for marine transmission |
US5697821A (en) * | 1993-11-29 | 1997-12-16 | Sanshin Kogyo Kabushiki Kaisha | Bearing carrier for outboard drive |
US5597334A (en) * | 1993-11-29 | 1997-01-28 | Sanshin Kogyo Kabushiki Kaisha | Outboard drive transmission system |
JP3470140B2 (en) * | 1993-11-29 | 2003-11-25 | ヤマハマリン株式会社 | Ship propulsion device |
JP3479941B2 (en) * | 1993-11-30 | 2003-12-15 | ヤマハマリン株式会社 | Ship propulsion device |
JP3413440B2 (en) * | 1994-05-31 | 2003-06-03 | ヤマハマリン株式会社 | Ship propulsion device |
JP3424020B2 (en) * | 1994-05-31 | 2003-07-07 | ヤマハマリン株式会社 | Ship propulsion device |
US5480330A (en) * | 1994-10-04 | 1996-01-02 | Outboard Marine Corporation | Marine propulsion pump with two counter rotating impellers |
SE506412C2 (en) * | 1994-11-25 | 1997-12-15 | Volvo Penta Ab | Bevel gear |
US10752328B1 (en) | 2019-01-08 | 2020-08-25 | Brunswick Corporation | Gear mounting assemblies for one or more propellers on a marine drive |
US11364987B1 (en) | 2019-12-20 | 2022-06-21 | Brunswick Corporation | Systems and methods for absorbing shock with counter-rotating propeller shafts in a marine propulsion device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2064195A (en) * | 1933-06-10 | 1936-12-15 | Michelis Peter De | Propulsion unit |
US2406460A (en) * | 1943-02-15 | 1946-08-27 | Curtiss Wright Corp | Dual rotation propeller system |
US2987031A (en) * | 1959-07-24 | 1961-06-06 | Conrad R Odden | Dual propeller propulsion |
US4302196A (en) * | 1979-01-24 | 1981-11-24 | Outboard Marine Corporation | Marine propulsion unit including propeller shaft thrust transmitting means |
SE451191B (en) * | 1982-09-13 | 1987-09-14 | Volvo Penta Ab | BATAR PROPELLER DRIVE |
-
1988
- 1988-02-29 US US07/162,191 patent/US4795382A/en not_active Expired - Lifetime
-
1989
- 1989-02-13 JP JP1503976A patent/JPH03504705A/en active Pending
- 1989-02-13 EP EP89903886A patent/EP0407424A1/en not_active Ceased
- 1989-02-13 WO PCT/US1989/000570 patent/WO1989008044A1/en not_active Application Discontinuation
- 1989-02-23 CA CA000591924A patent/CA1320665C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8908044A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA1320665C (en) | 1993-07-27 |
US4795382A (en) | 1989-01-03 |
WO1989008044A1 (en) | 1989-09-08 |
JPH03504705A (en) | 1991-10-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19900829 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 19911227 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19920615 |